CASU WFCAM/VISTA Explanation of documentation numbering system

The format for all VDFS documents issued by CASU should have the format:

This follows the ESO scheme outlined in http://www.ls.eso.org/documentation/id-keys.html However, this scheme is open to some interpretation and some further clarification is given here on how this is implemented at CASU.

BBB is the type of document. Applicable BBB codes are:

nnnnn is the product structure code. It was decided at CASU that this would be the CASU VDFS work package number. Thus, documents concerning PSF fitting get a -00016- code. Consideration was given to coding in the task number as well as the work package number, but it was thought that this level of detail would lead to difficulty in classifying some documents.

(Work package 2 is missing for a reason)

mmmm is a unique four-digit sequential number. At CASU we have used the interpretation of unique as meaning the whole number hence VDF-TRE-IOA-00016-0002 is the second document in the VDF-TRE-IOA-00016- series.

Note that this is different to the uniqueness criterion used for the VLT project where it seems VLT-ESO-mmmm is the unique part of the document number with BBB and nnnnn being additional information. For the VISTA project documents the type and originator codes are excluded from the uniqueness criterion, thus VIS-nnnnn-mmmm is the unique part.

Work package 2: ESO VISTA software interface deliverables and documentation